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LM4862M Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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LM4862M Datasheet(HTML) 3 Page - National Semiconductor (TI) |
3 / 10 page Automatic Switching Circuit External Components Description (Figure 1) Components Functional Description 1. R i Inverting input resistance which sets the closed-loop gain in conjunction with R f. This resistor also forms a high pass filter with C i at fc = 1/(2πRiCI). 2. C i Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a highpass filter with R i at fc = 1/(2πRiCi). Refer to the section, Proper Selection of External Components, for an explanation of how to determine the value of C i. 3. R F Feedback resistance which sets the closed-loop gain in conjunction with R i. 4. C S Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing section for proper placement and selection of the supply bypass capacitor. 5. C B Bypass pin capacitor which provides half-supply filtering. Refer to the Proper Selection of External Components section for proper placement and selection of the half-supply bypass capacitor. DS012342-21 FIGURE 2. Automatic Switching Circuit www.national.com 3 |
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